jellyfish
Enable an AI agent to recognise a jellyfish, assess its life stage and condition, and choose evidence-supported observation, care or handling actions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex
Purpose and description
Enable an AI agent to recognise a jellyfish, assess its life stage and condition, and choose evidence-supported observation, care or handling actions.
It can be Observe and photograph bell shape, appendages and movement while maintaining an appropriate contact distance.; Identify the animal to the narrowest supported taxon and preserve alternative identifications.; Monitor pulsation, tissue integrity, feeding and surrounding water conditions over time.; Assess whether collection, transfer or examination is justified, permitted and supported by an appropriate handling method.; Adjust captive feeding, lighting or water conditions when taxon-specific evidence supports the change.; Flag uncertain or potentially hazardous contact situations for specialist assessment..
Distinguishing features
Check for a medusoid body with a bell or umbrella and a mouth-bearing oral surface; transparency or gelatinous texture alone does not establish jellyfish identity.
Check for eight longitudinal rows of beating comb plates: their presence supports comb-jelly identification rather than jellyfish identification.
Check whether the apparent animal is an integrated medusa or a colony of specialised zooids; a floating gas bladder with dependent zooids supports a siphonophore interpretation.
Check for a barrel-shaped body with opposed siphonal openings and encircling muscle bands, which supports a salp interpretation.
Where suitable examination is available, use cnidocytes as evidence of cnidarian identity, while recognising that this does not by itself distinguish a jellyfish from other cnidarians.
Scope
+ Identification of an observed jellyfish, with evidence and confidence
+ Bell, tentacle, oral-arm and other visible anatomical features
+ Life stage and links to the organism's species-specific life cycle
+ Vitality, injury, feeding condition and observable behaviour
+ Immediate water conditions, ecological interactions and handling constraints
- Comb jellies, salps and other non-cnidarian gelatinous animals
- Siphonophore colonies such as Portuguese man-of-war
- Whole jellyfish populations, blooms and their regional forecasts
- Water bodies, currents and ecosystem condition as independent subjects
- Aquarium infrastructure and life-support equipment
- Human sting diagnosis and treatment
Characteristics
- Identification and confidence
- Candidate taxon or unidentified cnidarian medusa; confidence and supporting observations Species and group identity constrain interpretations of anatomy, life cycle, environmental needs and sting hazard.
- Bell dimensions
- Millimetres; diameter and height with posture and measurement method Supports identification, growth assessment and accommodation decisions without confusing contraction with size change.
- Tentacle and oral-arm configuration
- Observed number or estimate, arrangement, branching and relative length; absent, damaged or unobservable where applicable Helps distinguish taxa and separates normal anatomy from damage or poor visibility.
- Life stage
- Immature medusa, adult medusa or unresolved; ephyra where applicable Prevents juvenile anatomy and behaviour from being judged against adult expectations.
- Bell pulsation rate
- Contractions per minute with observation duration, temperature and disturbance context Provides a repeatable activity observation without treating inactivity alone as proof of death.
- Tissue and appendage condition
- Intact, torn, eroded, missing appendages, disintegrating or unresolved; affected location and extent Supports injury assessment and decisions about intervention.
- Immediate water conditions
- Temperature in °C, salinity with stated scale, dissolved oxygen in mg/L and flow speed in cm/s when measured Allows observed condition to be interpreted against evidence for the identified taxon and life stage.
- Feeding and symbiotic associations
- Observed prey capture or ingestion; identified or suspected photosymbionts with evidence Distinguishes nutritional dependencies that cannot safely be assumed for every jellyfish.
- Contact hazard assessment
- Unknown or assessed using taxon-specific evidence; include intact animal, stranded animal or detached tissue context Guides contact restrictions without assuming small size, immobility or stranding makes contact safe.
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.jellyfish
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 10 layers · 10 findings · 23 questions.
Jellyfish identity Establish whether the observed organism belongs under this registry entry and how precisely it can be identified.
The common name jellyfish can conceal materially different organisms and uncertain taxonomic boundaries.
Medusa recognition
Evaluate observable anatomy against jellyfish and gelatinous lookalike interpretations.
Medusoid body evidence
Record bell and oral-surface evidence, together with features supporting or excluding lookalikes.
- Which observed structures support an integrated cnidarian medusa rather than a comb jelly, salp or siphonophore colony? definition
- Which diagnostic structures were obscured, damaged or too small to inspect? boundary
Taxonomic resolution
Separate a supported identification from an appearance-based guess.
Supported taxon
Retain identification evidence, candidate alternatives and the limits of available observations.
- What identification key, expert determination or other evidence supports the assigned taxon? provenance
- What additional view or examination would distinguish the remaining candidate taxa? action
Bell and appendages Describe the animal's medusoid form and distinguish normal variation from loss or injury.
Bell shape and delicate appendages are central to jellyfish recognition, movement, prey capture and condition assessment.
Bell form
Capture bell geometry with the observation conditions needed to compare measurements.
Bell size and shape
Record dimensions, profile and visible symmetry without conflating contraction with growth or deformation.
- What are the bell diameter and height, and was the bell relaxed or contracted when measured? measurement
- Does the observed shape match the proposed taxon and stage, or require another explanation? boundary
Feeding appendages
Distinguish tentacles and oral arms and assess their observable completeness.
Appendage pattern and integrity
Record appendage arrangement and damage while preserving uncertainty caused by retraction or poor visibility.
- How many tentacles and oral arms are visible, where are they attached, and what lengths or branching patterns can be established? measurement
- Are apparently absent appendages normally absent for this taxon, retracted, obscured or demonstrably damaged? boundary
Life stage and vitality Interpret development, movement and tissue condition in the context of the identified jellyfish.
Juvenile form, reproductive state, inactivity and deterioration require different interpretations and actions.
Developmental context
Place the observed medusa within a supported life history.
Stage and life history
Record stage evidence and links to other stages without assuming every jellyfish follows the same developmental sequence.
- Which anatomical observations support the assigned developmental or reproductive stage? definition
- What evidence establishes whether this taxon has a polyp stage, an ephyra stage or another developmental route? provenance
Vitality assessment
Combine activity and tissue observations before judging the animal's condition.
Activity and deterioration
Record pulsation, orientation, responsiveness and tissue integrity with their environmental context.
- What pulsation rate, orientation changes and tissue abnormalities were observed over what interval? measurement
- What evidence distinguishes ordinary inactivity or current-driven movement from severe impairment or death? boundary
- Which observed changes justify closer monitoring or specialist assessment? action
Water and nutrition Connect the individual jellyfish to its immediate physical and nutritional environment.
Water conditions, flow, prey and sometimes photosymbionts directly affect jellyfish function and care decisions.
Water exposure
Record the conditions actually experienced by the animal.
Water compatibility
Compare measured conditions with supported requirements for the taxon and stage.
- What temperature, salinity, dissolved oxygen and flow conditions were measured near the animal? measurement
- Which taxon- and stage-specific evidence supports judging those conditions as suitable or stressful? provenance
Nutritional pathways
Establish how this jellyfish obtains nutrition and whether feeding appears effective.
Prey and photosymbionts
Distinguish observed ingestion, assumed prey availability and any supported photosymbiotic dependence.
- What prey capture and ingestion were observed, and over what observation period? measurement
- What evidence establishes photosymbiont presence or light dependence in this individual or identified taxon? provenance
- What feeding or lighting adjustment is supported by the identification and observed nutritional condition? action
Contact and intervention Determine how observation, contact, capture or transfer may proceed for this jellyfish.
Stinging structures and fragile tissues create distinct risks to people and to the animal.
Stinging contact
Assess contact hazards without inferring safety from appearance or apparent death.
Contact hazard evidence
Record the basis and uncertainty of a hazard assessment for the animal and any detached tissue.
- What reliable evidence describes the contact hazard of the supported candidate taxa? provenance
- What contact restrictions are justified while identification or tissue activity remains uncertain? action
Capture and care decisions
Evaluate whether an intervention has a justified purpose and a suitable method.
Intervention suitability
Connect the intended action to permissions, tissue fragility, environmental continuity and receiving conditions.
- What purpose and applicable permission support collecting, moving or examining this individual? action
- What transfer method and receiving water conditions are supported for its taxon, size and condition? action
- Which signs of bell damage, appendage entanglement or declining activity require the intervention to stop or change? boundary
What the second pass must settle
- Does this registry entry include stalked jellyfish and all hydrozoan medusae, or use a narrower meaning that must be documented?
- Should non-medusa stages be represented within this model or linked to separately registered polyp and life-cycle models?
- Which identification references provide reliable distinctions among juvenile, damaged and locally similar jellyfish taxa?
- Which taxon- and stage-specific baselines support vitality, environmental suitability and nutritional assessments?
- Which authoritative regional sources establish contact hazards, collection restrictions and appropriate capture or transfer methods?